>The affected Pokémon will lose 1⁄16 of its maximum HP at the end of the first turn, which then increases by 1⁄16 each turn. In other words, they lose 1⁄16, 2⁄16, 3⁄16, 4⁄16 and so on.
It will take less than 16 turns for a Pokemon to be knocked out by toxic poison